Controller expansion module



FIG. 1 is a perspective view taken from the top, front left side of a controller expansion module embodying our new design;

FIG. 2 is a front end elevational view of FIG. 1;

FIG. 3 is a rear end elevational view of FIG. 1;

FIG. 4 is a right side elevational view of FIG. 1;

FIG. 5 is a left side elevational view of FIG. 1;

FIG. 6 is a top plan view of FIG. 1; and,

FIG. 7 is a bottom plan view of FIG. 1. 

The ornamental design for a controller expansion module, as shown and described. 